<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8">
    <title>鼠标事件案例</title>
</head>

<body>

    <div onmouseover="mOver(this)" onmouseout="mOut(this)"
        style="background-color:#D94A38;width:120px;height:20px;padding:40px;">Mouse Over Me</div>
    <script>
        function mOver(obj) {
            obj.innerHTML = "Thank You"
        }

        function mOut(obj) {
            obj.innerHTML = "Mouse Over Me"
        }
    </script>

</body>

</html>